The 4G capable Nokia Lumia 710 was the first phone in the US to run the Windows Phone OS 7.5 (Mango). It is powered by a 1.4GHz Snapdragon processor & 512MB RAM, 3.7" 800x480 ClearBlack touchscreen display, 5MP camera with f/2.2 lens, and full HTML5 web browsing. The Windows 7.5 OS promises strong voice control over the phone as well as Facebook chat, Twitter & LinkedIn built-in.